Sources and methodology

Prisoners (state and federal)

This is the number of state and federal prisoners incarcerated in the district. The Census publishes the number of incarcerated people in each block in Summary File 1, Table P37. We then identified which incarcerated populations in each block were state or federal prisoners.

Black prison population

The Census publishes the race of the correctional population at the tract level in Summary File 1, Table PCT17B and at the block level for the total population in Table P7. We used these two data sources to identify the number of Black prisoners incarcerated in state or federal prisons in blocks in each district.

Population

This is the total population of each county as published by the Census Bureau in Table P1 of Summary File 1.

White population

This is the White population as published by the Census Bureau in Table P7 of Summary File 1.

Black population

This is the Black population as published by the Census Bureau in Table P7 of Summary File 1.

Percent of county population in state or federal prisons.

This is the prison population divided by the total county population.

Percent of county Black population in state or federal prisons.

This is the Black prison population divided by the total Black county population.

Percentage of county that is White.

This is the White population divided by the total county population.

Black resident population

This is the number of Blacks in the district who are not in state or federal prison.